基于LabView的松科2井项目管理系统          下载免费PDF全文

张恒春  闫家  谈晓丽  孟庆鸿  王稳石  曹龙龙  朱永宜  许洁 《探矿工程》2018,45(10):171-176

松科二井2013年正式启动,2018年5月完井,历时6年,最终井深7018 m。项目执行过程中,形成合同700多个、文件200多个、汇款流水1000多笔、报账流水1600多笔。针对松科二井合同、文件繁多,财务流程繁杂,涉及项目多的特点,基于LabVIEW平台设计了一套项目管理系统。该系统可全程记录松科二井上述合同、文件、汇款和报账信息,建立合同及对应批次汇款和报销的勾稽关系,具有模糊查询、修改、超链接等功能。  相似文献   

北极斯瓦尔巴特群岛及邻区天然气水合物分解对气候、海洋环境和生物的影响     

聂云峰  于晶  陈宏文  万玲  范广慧  房强  吴怀春 《现代地质》2018,32(5):1012

天然气水合物是一种潜在的巨量能源,但其分解释放的甲烷可能对全球气候与海洋环境产生巨大影响。然而,人们目前对天然气水合物分解产生的环境和生物效应的了解还不够全面。北极地区的斯瓦尔巴特群岛及邻区的海底和冻土层中蕴含大量甲烷,对气候变化十分敏感,是人们研究天然气水合物对气候变化的响应机制和其分解对生态环境影响的绝佳场所。系统总结了斯瓦尔巴特群岛及邻区水合物分解的气候与环境效应,发现目前研究区水合物分解产生的甲烷进入大气的年际通量不大,对全球气候的影响可能有限;水合物分解对海底滑坡起到催化剂的作用,但不是首要因素;海底水合物分解释放的甲烷能打破原有的化学平衡、生产力分布规律与输送机制、生物耦合关系甚至不同栖息地间的连通性,进而影响底栖生物群落。这些认识对研究天然气水合物开采对生态环境可能造成的影响和采取相应防治措施具有一定的借鉴意义。  相似文献   

内蒙古北山额勒根乌兰乌拉一带土壤测量地球化学特征及找矿方向     

张善明  兰生科  贺中银  韩志敏  陈强  王永晖 《现代地质》2018,32(4):655

研究区位于内蒙古北山北带,成矿地质条件优越,1∶20万水系沉积物测量异常明显,且分布有额勒根乌兰乌拉斑岩型钼(铜)矿。以1∶5万土壤地球化学测量成果为依据,以地质认识为基础,研究了区内元素地球化学数据特征、地球化学场特征及综合异常特征。认为区内主成矿元素为Mo、Cu、Au,主要的控矿层位为咸水湖组火山岩段,成矿有利侵入体为石炭纪花岗闪长岩。划分出5种综合异常类型,其中与斑岩钼(铜)矿系统有关的综合异常和与奥陶系建造有关的综合异常是今后解剖找矿的重点。  相似文献   

A New Ootype of Dinosaur Egg (Faveoloolithidae: Duovallumoolithus shangdanensis oogen. et oosp. nov.) from the Late Cretaceous in the Shangdan Basin,Shaanxi Province,China     

ZHENG Tingting  BAI Yi  WANG Qiang  ZHU Xufeng  FANG Kaiyong  YAO Yuan  ZHAO Yongqiang  WANG Xiaolin 《《地质学报》英文版》2018,92(3):897-903

A new ootype collected from the Upper Cretaceous Lijiacun Formation in the Shangdan Basin, Shaanxi Province is described in this paper. Based on general external shape, size, eggshell thickness and honeycomb‐like eggshell microstructure, eggs are referable to the oofamily Faveoloolithidae. Compared with other members of Faveoloolithidae, specimens described in this paper show special characteristics: adjacent pores are usually separated by two eggshell units between which often develop interspaces; columnar eggshell units are relatively closely arranged in radial view. According to these characteristics, we erect a new oogenus and a new oospecies: Duovallumoolithus shangdanensis oogen. et oosp. nov. The new discovery expands the diversity of Faveoloolithidae.  相似文献   

碳酸盐岩风化过程中高场强元素的地球化学行为研究——来自碳酸盐岩淋溶实验的证据   总被引：1，自引：0，他引：1  

冯志刚  刘炫志  韩世礼  马强 《中国岩溶》2018,37(3):315-329

选择黔中地区的一条白云岩原位风化剖面（平坝剖面）作为研究对象,通过对岩-土界面之下的岩粉层（砂状碳酸盐岩）动态淋溶过程中高场强元素（HFSE）地球化学行为的研究,并结合其在风化壳剖面的分布特征,获得了以下主要认识:（1）碳酸盐岩风化过程中,HFSE间存在明显的分馏,而且元素分馏主要出现在岩-土界面作用过程中,即碳酸盐岩溶蚀形成残积土阶段;元素的地球化学惰性由强到弱的顺序依次为Zr>Hf>Nb>Sc>Th>Ta>Ti>Y,其中,Zr是最稳定的元素,Hf仅次于Zr,Nb和Sc也相对较为惰性,而Th、Ta、Ti、Y呈现出明显的活性;（2）对于碳酸盐岩风化剖面的质量平衡计算,Zr是理想的参比元素（即惰性元素）;（3）由基岩酸不溶物至风化壳剖面,元素对Nb-Ta、Zr-Hf显示出较好的协变性,没有明显分馏,因此,在利用这类元素对岩溶区风化壳的物源进行示踪时,碳酸盐岩作为潜在母岩,宜采用其酸不溶物作为参比对象;（4）碳酸盐岩风化过程中,虽然Sc也是一个较为稳定的HFSE,但在风化母岩中分布不均匀,不宜用于岩溶区风化壳的物源示踪。   相似文献   

准噶尔盆地吉木萨尔凹陷梧桐沟组层序地层划分     

郭佳  宋双  王一博 《江苏地质》2018,42(4):558-567

准噶尔盆地吉木萨尔凹陷二叠系梧桐沟组作为一套重要的储集岩,具有良好的油气成藏前景,但对其层序划分及地层沉积样式的认识一直存在争议。在构造背景分析的基础上,结合岩芯、测井及地震资料,对研究区梧桐沟组层序地层划分及地层沉积样式研究表明,梧桐沟组沉积时期构造强度较弱,地形较为平缓,地层在全区稳定分布;中晚二叠世盆地发生造山运动,吉木萨尔凹陷东南边缘区域经过构造抬升,上部地层遭受不同程度的剥蚀,形成了现今"底平顶削"的地层样式。以凹陷中部少数地层保存较全的井的地层叠加样式分析为基础,通过井-震结合识别不同类型界面,特别是最大湖泛面,建立了区域层序地层格架,即梧桐沟组为一个完整的长期基准面旋回(三级层序),并在其内部识别出5个中期旋回。梧桐沟组地层在不同的层序发育时期表现出不同的旋回叠加样式:下段沉积时期,即最大湖泛面以下,随着可容纳空间的增大,地层表现为明显的退积叠加样式;上段沉积时期,即最大湖泛面以上,随着可容纳空间的减小,地层表现为明显的进积叠加样式,符合沉积物体积分配原理。  相似文献   

Middle Jurassic–Early Cretaceous tectonic evolution of the Bayanhushuo area,southern Great Xing’an Range,NE China: constraints from zircon U–Pb geochronological and geochemical data of volcanic and subvolcanic rocks     

Qing-Bin Guan  Bin Wang  Xiong Wang  Xing-An Wang  Qiang Shi 《International Geology Review》2018,60(15):1883-1905

This study presents new zircon U–Pb geochronology, geochemistry, and zircon Hf isotopic data of volcanic and subvolcanic rocks that crop out in the Bayanhushuo area of the southern Great Xing’an Range (GXR) of NE China. These data provide insights into the tectonic evolution of this area during the late Mesozoic and constrain the evolution of the Mongol–Okhotsk Ocean. Combining these new ages with previously published data suggests that the late Mesozoic volcanism occurred in two distinct episodes: Early–Middle Jurassic (176–173 Ma) and Late Jurassic–Early Cretaceous (151–138 Ma). The Early–Middle Jurassic dacite porphyry belongs to high-K calc-alkaline series, showing the features of I-type igneous rock. This unit has zircon ε_Hf(t) values from +4.06 to +11.62 that yield two-stage model ages (T_DM2) from 959 to 481 Ma. The geochemistry of the dacite porphyry is indicative of formation in a volcanic arc tectonic setting, and it is derived from a primary magma generated by the partial melting of juvenile mafic crustal material. The Late Jurassic–Early Cretaceous volcanic rocks belong to high-K calc-alkaline or shoshonite series and have A₂-type affinities. These volcanics have ε_Hf(t) and T_DM2 values from +5.00 to +8.93 and from 879 to 627 Ma, respectively. The geochemistry of these Late Jurassic–Early Cretaceous volcanic rocks is indicative of formation in a post-collisional extensional environment, and they formed from primary magmas generated by the partial melting of juvenile mafic lower crust. The discovery of late Mesozoic volcanic and subvolcanic rocks within the southern GXR indicates that this region was in volcanic arc and extensional tectonic settings during the Early–Middle Jurassic and the Late Jurassic–Early Cretaceous, respectively. This indicates that the Mongol–Okhotsk oceanic plate was undergoing subduction during the Early–Middle Jurassic, and this ocean adjacent to the GXR may have closed by the Late Middle Jurassic–Early Late Jurassic.  相似文献   

Zircon U–Pb–Hf isotopes and geochemistry analyses of the Huyu igneous rocks in northwestern Beijing,China: possible new evidence for the initial destruction of the North China Craton     

Zejia Ji  Baofu Han  Haifei Yu  Yan Chen 《International Geology Review》2018,60(2):196-216

The timing and extent of cratonic destruction are crucial to understanding the crustal evolution of the North China Craton (NCC). Zircon U–Pb–Hf isotope data and the whole-rock major and trace element characteristics of the Huyu igneous rocks in northwestern Beijing, China, provide possible new evidence for the initial destruction of the NCC. The igneous rocks occur as several sills and dikes, including lamprophyre, monzonite porphyry, and aplite. The lamprophyres have high Mg^# and K₂O contents. The monzonite porphyries have high Mg^#, high K₂O contents, and negative ε_Hf(t) values with zircon U–Pb ages of 225.5–227.7 Ma. These two types of rocks are both enriched in large ion lithosphere elements (LILEs) and light rare earth elements (LREEs) but are depleted in high field strength elements (HFSEs) and high rare earth elements (HREEs) and have almost no Eu anomalies and relatively high total rare earth element (ΣREE) contents. In contrast, the aplites exhibit high silica and K₂O contents, low MgO contents, and more negative ε_Hf(t) values with a zircon U–Pb age of 206.2 Ma. The aplites are also enriched in LILEs and LREEs but are depleted in HFSEs and HREEs, with strongly negative Eu, Ti, P, La, Ce, and Sr anomalies and relatively low ΣREE contents. These results indicate that the lamprophyres and monzonite porphyries represent a continuous cogenetic magma evolution series after melt derived from an enriched metasomatized lithospheric mantle experienced crust assimilation and fractional crystallization. The aplites were produced by the fractional crystallization of low-Mg parental magma derived from melting of the ancient Archaean crust. The occurrence of the Huyu intrusive rocks with many other plutons of similar ages on the northern margin of the NCC suggests that the northern NCC entered an intraplate extensional tectonic environment in the Late Triassic.  相似文献   

地球接受太阳辐射能量变化对板块构造影响的估算          下载免费PDF全文

田嘉铖  季建清 《地质科学》2018,(4):1499-1512

板块构造理论可以被认为是构造地质学研究的基本模型和框架。传统板块构造理论认为岩石圈板块在软流圈上方随软流圈对流发生运动,软流圈对流所需要的能量则完全由地球内部能量,如重力势能和放射性衰变产生的热能提供。但是近年来的一些研究证明了气候变化会对板块构造活动,如造山带活动产生直接影响。对传统的板块构造所需能量全部由地球内部提供这一观点做出了补充和更新。本文主要从两个方面对外动力作用可能影响板块构造做出分析,一是利用傅里叶分析证明了太阳辐射变化在构造活动,如洋中脊两侧地貌和火山沉积物中均能够留下记录;二是建立了一个简单的平面力学模型,探究洋流同大陆的力学作用会如何影响大陆运动特征。虽然这一模型忽略了很多因素,定量计算的结果本身并不具有很严格的数据绝对意义。但是这一模型的结果可以证明地球所有板块构造活动中释放的能量低于地球系统每年从太阳辐射中接收的能量,而且模型得到的大陆运动特征同现今实际观测下的运动特征存在一致性,洋流向大陆岩石圈传递的能量同地震活动释放的能量处于同一量级,从侧面可以证明洋流可能对板块构造产生了较大的影响。  相似文献   

Club convergence and spatial distribution dynamics of carbon intensity in China’s construction industry     

Qiang Du  Min Wu  Yadan Xu  Xinran Lu  Libiao Bai  Ming Yu 《Natural Hazards》2018,94(2):519-536

Climate change caused by carbon emissions continuously threatens sustainable development. Due to China’s immense territory, there are remarkable regional differences in carbon emissions. The construction industry, which has strong internal industrial differences, further leads to carbon emission disparity in China. Policymakers should consider spatial effects and attempt to eliminate carbon emission inequality to promote the sustainable development of the construction industry and realize emission reduction targets. Based on the classic Markov chain and spatial Markov chain, this paper investigates the club convergence and spatial distribution dynamics of China’s carbon intensity in the construction industry from 2005 to 2014. The results show that the provincial carbon intensity in the construction industry is characterized by “convergence clubs” during the research period, and very low-level and very high-level convergence clubs have strong stability. Moreover, the carbon intensity class transitions of provinces tend to be consistent with that of their neighbors. Furthermore, the transition of carbon intensity types is highly influenced by their regional backgrounds. The provinces with high carbon emissions have a negative influence on their neighbors, whereas the provinces with low carbon emissions have a positive influence. These analyses provide a spatial interpretation to the “club convergence” of carbon intensity.  相似文献